31400720

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{277}}^1$

素因数の和:412

約数の個数: 80

約数和(自身を含む): 79630320

約数和(自身を除く): 48229600

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 109, 130, 208, 218, 260, 277, 436, 520, 545, 554, 872, 1040, 1090, 1108, 1385, 1417, 1744, 2180, 2216, 2770, 2834, 3601, 4360, 4432, 5540, 5668, 7085, 7202, 8720, 11080, 11336, 14170, 14404, 18005, 22160, 22672, 28340, 28808, 30193, 36010, 56680, 57616, 60386, 72020, 113360, 120772, 144040, 150965, 241544, 288080, 301930, 392509, 483088, 603860, 785018, 1207720, 1570036, 1962545, 2415440, 3140072, 3925090, 6280144, 7850180, 15700360, 31400720]

約数ペア:

[(1, 31400720), (2, 15700360), (4, 7850180), (5, 6280144), (8, 3925090), (10, 3140072), (13, 2415440), (16, 1962545), (20, 1570036), (26, 1207720), (40, 785018), (52, 603860), (65, 483088), (80, 392509), (104, 301930), (109, 288080), (130, 241544), (208, 150965), (218, 144040), (260, 120772), (277, 113360), (436, 72020), (520, 60386), (545, 57616), (554, 56680), (872, 36010), (1040, 30193), (1090, 28808), (1108, 28340), (1385, 22672), (1417, 22160), (1744, 18005), (2180, 14404), (2216, 14170), (2770, 11336), (2834, 11080), (3601, 8720), (4360, 7202), (4432, 7085), (5540, 5668)]